Mine does the same thing, she is one of my favorite fish, so much personality. Like a little water dog. Wags tail, is always happy to see me. She was very happy in my 150g, she is now in a 210 and is finally settling in, she doesn't seem to like the bigger tank yet. But then she did grow up in the 150, so maybe she wasn't ready to leave home yet and move into a bigger house?